martin



Nirnn STATES JAMES B. MARTIN, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO THE MARTIN MIDDLINGS PURIFIER COMPANY, OF SAME PLACE.

' BREAK-SCALPER.

SPECIFICATION forming part of Letters Patent'No. 415,050, dated November 12, 1889.

Application filed May 20, 1889. Serial No. 311,452. (No model.)

To all wh mn) it may concern.-

Be it known that I, JAMES B. MARTIN, a citizen of the United States, residing at Grand Rapids, in the county of Kent and State of Michigan, have invented certain new and useful Improvements in Break-Scalpers; an d I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the gradual-reduction process (so called) of milling, and has for its object to effect a separation of the chop -that is, the gross product of the break on reduction. Heretofore it has been customary in this process to run the chop as it comes from the breaking apparatus over an inclined screen for taking put the middlings and sending the coarse chop to be reground without other purifying. In consequence, a large quantity of fluff and other impurities pass into the flour and middlings, lowering their standard. To avoidthis and other incidental objections, I separate the flour and middlings from the coarse chop and subject the latter to an air-blast, for removing these impurities, by means of the apparatus illustrated in the accompanying drawings, and in Which V Figure 1 is a perspective (with parts of casing and other parts removed to show construction and arrangements of parts) of a machine embodying my invention, and Fig. 2 is a central vertical section of the same.

Like letters indicate like parts in each of the figures.

A represents the frame of the machine, provided with any suitable casing.

B is the hopper through which the stock enters the machine, and is provided with a feed-roll B.

C is a flue or .aspirator, the lower end or foot of which has an opening connecting with the tail of the screening apparatus, and whereby it is enabled to operate also as the dis-- charge-pipe for the coarse stock, and the upper end of which connects with the'peripheral draft-fan A, and is also provided with the damper C for regulating the air-current.

The shaft I is journaled in bracket-boxes 1, secured to the frame upon-'opposite sides.

The frame D, which supports the screening apparatus, has its upper end pivoted upon shaft I, and its free lower end is pendent by strap L, provided with the capstan K, for raising and lowering the same, by means of which the vertical inclination of said frame may be adjusted more or less, as may be necessary. The frame-E of the vibrating screen T is suspended withinv the frame D by means of spring-hangers J, and has the feed-board R, provided with the gage S, the bar 0, and pitman g, actuated by the shaft I. The'shaft I is provided With an eccentric, to which the end of g is pivoted, and is journaled to frame D in suitable boxes, as shown in Fig. 1.

H is a slot through the side of the casing, for accommodating the outer end of the shaft I when the frame D is raised or lowered.

lWI is the tail-board of the screen T, and is rigidly secured to the frame P of the shoe P and partakes of its motion, and conducts the coarse chop from the tail of the screen through the opening 0 into the lower end of the flue 0, through which it is discharged from the machine.

The screen T is provided with a cleaningbrush F, secured to a chain-belt F, having idle-pulley n and sprocket-pulley n, secured .upon the shaft I and arranged underneath said screen, and adapted to sweep its lower surface.

P represents a vibrating frame mounted upon flexible supports or legs J, attachedto the frame A, arranged underneath the screen. Its function is to support the shoe P, which collects the fine material that has fallen through the screen and discharges it through the opening Q. It is actuated by the shaft I, having an eccentric to which the pitman g, having its inner end secured to barO, is pivoted. The shaft I" is journaled to the frame by bracket journal-boxes 3.

It will be observed that the construction of the apparatus is such that air currents or drafts are not permitted to pass through the stock while it is undergoing the screening or sitting process. I

The machine operates substantially as fol lows: Motion being communicated to the several shafts (and for this purpose I prefer to provide three pulleys arranged as shown in ICO Fig. 2 by dotted outline, all of which may be operated by a single belt) and chop supplied to the hopper in any convenient manner, it is 'fed into the machine by feed-roll I3 and falls upon the inclined feed-board R, and is evenly distributed over the head of the screen '1 by notched gage S, and travels down the screen, which has alively oscillating motion, by means whereof the stock is thoroughly shaken and sifted in its downward course, the finer particles passing through the sieve and falling upon the shoe, while the coarse chop, falling upon the board M, is conducted through the opening 0 into the flue C, where it meets a current of ai induced by the fan A, passing up the flue C, which carries the liuif and otherimpurities out of the machine, leaving the coarse chop freed therefrom.

I have described a machine constructed with a single sifting apparatus, fan, and lluc; but it is evident that one or more may be combined and used, arranged in a single frame and easing as desired.

\Vhat I claim, and desire to secure b y Letters Patent of the United States, is-

1. In a break-scalpel, a main frame, one or more inclined vibrating screens arranged within a frame, as I), and having a tailboard M, a shaft I, to which the upper end of said frame is pivoted, a strap at the opposite end of said frame, and means for winding said strap, in combination with a flexibly-supported shoe to which said tail'board is secured, a cleaning-brush, and a chain-belt to which said cleaning-brush is secured, an idlepulley and a sprocketpulley secured upon said shaft I, all constructed, arranged, and operating in the manner and for the purposes herein set forth.

2. In a b1'eakscalpe1',a main frame and one or more screens, in combination with a frame D, spring-hangers for suspending said screen or screens within the frame D, a shaft I, to the upper end of which said frame pivoted, a strap at the opposite end of said frame, and means for winding said strap, all substantially as shown, and for the purposes set forth.

3. In a break-scalpel, a main frame, one or more screens arranged within a suit-able frame, as I), a shaft. I, to which the upper end of said frame is pivoted, a strap at the opposite end of said frame, and means for winding said strap, in combination with a transverse bar, as O, shaft I, provided with an eccentric, and pitman g, having its end pivoted to said eccentric, all substantially as shown, and for the purposes set forth.

t. In a break-scalpel, a main frame, one or more inclined vibrating screens arranged within a frame, as l), and having a tail-board M, a shaft I, to which the upper end of said frame is pivoted, a strap at the opposite end of said frame, and means for winding said' strap, in combination with a shoe I, mounted on flexible supports beneath said screens, to which shoe said tail'board is secured, frame P, supporting said shoe, actuating-shaft I, having an eccentric, and pitman g, extendin g from said frame and having its end opposite thereto pivoted to said eccentric, all substantially as shown, and for the purposes set forth. I it In testimony whereof I aflix my signature in presence of two witnesses.

JAMES B. MI'KR'IIN.

\Vitnesses:

Dennis L. Roonns, LUTHER V. MOUL'ION. 

